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4 J. H. STONBMBTZ. PLATE BENDING MACHINE.

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PLATE BBNDING MAGHINE.

Nn. 465,637. Patented Deo. 22, 1891.

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M n gmwjwm arten rafts JOHN II. STONEMETZ, OF MILLBURY, MASSACHUSETTS, ASSIGNOR TO THE STONEMETZ PRINTERS MACHINERY COMPANY, OF SAME PLACE.

PLATE-BENDING MACHINE.

SPECIFICATON forming part of Letters Patent No. 465,63*?, dated December 22, 1891.`

Application tiled .l'uly 20, 1891. Serial No. 400,022. (No model.)

To @ZZ whom t may concern:

Be it known that I, JOHN H. STONEMETZ, a citizen of the United States, residing at Millbury, in the countyof Torcester and State of Massachusetts, have inventeda new and useful Improvement in Plate-Bending Machines, of which the following' is a specification.

The aim of this invention is to produce a n'ewand improved machine for bendingstereotype orlelectrotype plates; and to this end the invention consists of the device described and claimed in this specification and illustrated in the accompanying drawings, in Which- Figure l is a side elevation of the machine. Fig. 2 is a section on line :r ce of Fig. `l; and Fig. 3 is a section on line y g/ of Fig. 2, the details in the various figures being slightly varied, as will be further described.

In detail, l represents a frame, which consists of the boxiike structure and the supporting-legs- Integral with the frame and rising above the main part of the same are the bearings 2 2, journaled in Which is the shaft Keyed on this shaft 3,betWeen said bearings 2 2, is the cylinder a, and fastened to the cylinder is the usual protectiugplate 5 of sheet-iron or steel. Fastencd on end of the shaft 3 is the Worm-gear (l, and this gear is driven by means of Worin 7 fast on shaft S, which is mounted in suitable bearings bolted to the frame. On the end of this shaft may be placed any suitable means to rotate the shaft by hand or power-as, for example, the tight and loose pulleys 9 and l0, as shown. On the inside of the bearings 2 2 are formed or fastened the hubs ll. ll, which are eccentric to the shaft 3 and the cylinder e by the distance a, Fig. l, and jonrnaled or hung on these eccentric hubs are the bearings l2 of the frames 13. together by a hood it, Which is fastened by bolts l5 to the outside edges of the same. This eccentric hood let may of itself form the eccentric concave or bending-surface against which the plates are bent, as shown in Fig. but the preferred construction is to use a series of rollers 17, Which are turned down at their ends, as at 1G, and are journaled in the frames 13. These rolls 17 are set on a circle Whose center is the center of the eccentric hubs 11 and form the bending-surface. The

The frames 13 are fastened l frames 13 may have the handles 1S to adjust the same, as shown in Fig. l. The frames 13 may also have the raised portions 19 bearing against the main frame.` These raised portions are slotted, as shown, and passing through the same through the slots are the bolts 20, the heads of 4which bear on the in side of the frames lhand the bolts have the nuts 2l.

It is evident that by tightering the nuts 2l the frames 13 Will be drawii" again-st the main frame and thus tightly clamped in place. The preferred arrangement for turning the frames 13 on the eccentric-hubs ll is shown in Figs. 2 and 3.

Fastened or formed on the outside of the hood 14. is the toothed sector 22, forming in reality part of the Wormvhecl. Bolted to the front of the frameis the bracket 23, and journaled in this bracket is a shaft, fastened cn the inside end of Which is the Worm 24- and on the outside end the hand-Wheel 25. The worm 24 is in mesh With the sector 22, and it is evident that by a manipulation of' the hand-Wheel the frames 13 and hood let may be turned on the eccentric-hubs ll. Generally when I use this Worm arrangement I omit the clamping-screws 2O and depend upon the gearing to hold the concave or bending surface in its adjusted position. It is evident that as the bendingesurface is journaled eccentrically to the cylinder e the same may be adjusted relatively to the cylinder 4 by simply turning the same, and also that the bending"- surface is in all positions held parallel tothe cylinder.

The concave or rolls are shown adjusted the closest possible to the cylinder in Fig. l and the farthest from the cylinder in Fig. 3, and it will be seen that the same may be set at any intermediate point. As the thickness of the plates varies and as it is necessary to apply more pressure to some plates than to cthers,this adjustment is necessary. A pointer 2G may be arranged, as shown, so as to indicate on a graduated scale formed on the edge of the hood lat the exact point at which the surface is set.

As the concave or the seriesof rolls, as the case may be, is always seteccentricallyto the bending-cylinder et, being farthest from the IOO same at the `point where the plate enters between the concave and the cylinder, the bending action will be gradual and the plate will.

Y one point, as in the latter the plate is apt to crackand the face of the type to be spoiled, as the pressure is thus all concentrated.

'.lhe operation of the machine is as follows: The plate is placed on the cylinder with the face of the type toward the protecting-plate 5, and a sheet of sti card-board is preferably placed on the face of the type to protect the same, as described in patent to Wilbur, No. 82,463, September 22,1868. The bending-surface, the hood, or the series ot' rolls, as the case may be, is adjusted relatively to the cylinder 4, as before described, so that the right degree of pressure Will be brought to bear upon the plate. The cylinder is now rotated and the plate is thus carried around between the cylinder and the bending-surface, and thus is `gradually bent and made to conform to the cylinder. When the cylinder has made a cornplete revolution, the plate may be lifted from the same or may be again sent through the machine, the bending-surface being set a little nearer to the cylinder, so that the plate will absolutely bend to the desired shape.

The bending-surface is not necessarily circular, but may be formed on any other suitable line, so that the bending action will be gradual. The surface might also be mad-e to revolve around the cylinder, the latter remain- 4o ing stationary.

The details of construction herein shown maybe greatly varied by a skilled mechanic without departing from the scope of my invention.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. A plate-bending machine consisting` of the cylinder and a bending-surface pivoted eccentrically to the cylinder and means for turning said surface about its pivot, substantially as described.

2. The combination of the frame 1, the cylinder 4, journaled in the same, the eccentrichubs 11, formed on the frame, the frames 13, hung on said hubs 11 and connected by the hood 14, and means for adjusting said hood, substantially as described.

3. The combination of the frame 1, the cylinder 4, mounted or journaled in the said frame, the eccentric-hubs 11, formed on the frame, the frames 13, hung on said hubs 11 and connected by hood 14, the series of rolls journaled in said frames 13, the sector 22, formed on the hood 14, the worm 24, meshing` therewith, and means for turning said Worm. whereby the series of rolls may be adjusted relatively to the said cylinder, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

l JOHN Il. STONEMETZ.

Witnesses:

Louis W. SOUTHGATE, J AMES J. RAFFERTY. 

